Why does my 4 cylinder 2000 honda accord have trouble reaching 100 mph?

[iluvcrippy]

It used to easily go 120 mph no problem.
It runs fine and doesnt make any strange noises, and it used to easily reach 120 mph.
i can still reach 120 but its just not the same, it used to run smooth at 120, but now i have to redline the bitch.

 

[Jeremy S]

speed limit is 65 on highway no car should be going that fast especially a matchbox

 

[arkalarsf]

push on the gas harder